/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.put.netbeans.dcs_modeler;

import java.awt.Component;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.MessageFormat;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import javax.swing.JComponent;
import javax.swing.event.ChangeListener;
import org.netbeans.api.project.ProjectManager;
import org.netbeans.spi.project.ui.support.ProjectChooser;
import org.netbeans.spi.project.ui.templates.support.Templates;
import org.openide.WizardDescriptor;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.util.Exceptions;
import org.openide.util.NbBundle;
import org.openide.xml.XMLUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

public class ComputingWorkflowProjectWizardIterator implements WizardDescriptor./*Progress*/InstantiatingIterator
{

    private int index;
    private WizardDescriptor.Panel[] panels;
    private WizardDescriptor wiz;

    public ComputingWorkflowProjectWizardIterator()
    {
    }

    public static ComputingWorkflowProjectWizardIterator createIterator()
    {
        return new ComputingWorkflowProjectWizardIterator();
    }

    private WizardDescriptor.Panel[] createPanels()
    {
        return new WizardDescriptor.Panel[]{
            new ComputingWorkflowProjectWizardPanel()
        
    

      
    
            ,
            };
    }

    private String[] createSteps() {
        return new String[] {
            NbBundle.getMessage(ComputingWorkflowProjectWizardIterator.class, "LBL_CreateProjectStep" )
        };
    }

    public Set/*<FileObject>*/ instantiate(/*ProgressHandle handle*/) throws IOException
    {
        Set<FileObject> resultSet = new LinkedHashSet<FileObject>();
        File dirF = FileUtil.normalizeFile( ( File ) wiz.getProperty( "projdir" ) );
        dirF.mkdirs();

        FileObject template = Templates.getTemplate( wiz );
        FileObject dir = FileUtil.toFileObject( dirF );
        unZipFile( template.getInputStream(), dir );

        // Always open top dir as a project:
        resultSet.add( dir );
        // Look for nested projects to open as well:
        Enumeration<? extends FileObject> e = dir.getFolders( true );
        while ( e.hasMoreElements() )
        {
            FileObject subfolder = e.nextElement();
            if ( ProjectManager.getDefault().isProject( subfolder ) )
            {
                resultSet.add( subfolder );
            }
        }

        File parent = dirF.getParentFile();
        if ( parent != null && parent.exists() )
        {
            ProjectChooser.setProjectsFolder( parent );
        }

        return resultSet;
    }

    public void initialize( WizardDescriptor wiz )
    {
        this.wiz = wiz;
        index = 0;
        panels = createPanels();
        // Make sure list of steps is accurate.
        String[] steps = createSteps();
        for ( int i = 0; i < panels.length; i++ )
        {
            Component c = panels[i].getComponent();
            if ( steps[i] == null )
            {
                // Default step name to component name of panel.
                // Mainly useful for getting the name of the target
                // chooser to appear in the list of steps.
                steps[i] = c.getName();
            }
            if ( c instanceof JComponent )
            { // assume Swing components
                JComponent jc = ( JComponent ) c;
                // Step #.
                jc.putClientProperty( "WizardPanel_contentSelectedIndex", new Integer( i ) );
                // Step name (actually the whole list for reference).
                jc.putClientProperty( "WizardPanel_contentData", steps );
            }
        }
    }

    public void uninitialize( WizardDescriptor wiz )
    {
        this.wiz.putProperty( "projdir", null );
        this.wiz.putProperty( "name", null );
        this.wiz = null;
        panels = null;
    }

    public String name()
    {
        return MessageFormat.format( "{0} of {1}",
                                     new Object[]{ new Integer( index + 1 ), new Integer( panels.length ) } );
    }

    public boolean hasNext()
    {
        return index < panels.length - 1;
    }

    public boolean hasPrevious()
    {
        return index > 0;
    }

    public void nextPanel()
    {
        if ( !hasNext() )
        {
            throw new NoSuchElementException();
        }
        index++;
    }

    public void previousPanel()
    {
        if ( !hasPrevious() )
        {
            throw new NoSuchElementException();
        }
        index--;
    }

    public WizardDescriptor.Panel current()
    {
        return panels[index];
    }

    // If nothing unusual changes in the middle of the wizard, simply:
    public final void addChangeListener( ChangeListener l )
    {
    }

    public final void removeChangeListener( ChangeListener l )
    {
    }

    private static void unZipFile( InputStream source, FileObject projectRoot ) throws IOException
    {
        try
        {
            ZipInputStream str = new ZipInputStream( source );
            ZipEntry entry;
            while ( ( entry = str.getNextEntry() ) != null )
            {
                if ( entry.isDirectory() )
                {
                    FileUtil.createFolder( projectRoot, entry.getName() );
                } else
                {
                    FileObject fo = FileUtil.createData( projectRoot, entry.getName() );
                    if ( "nbproject/project.xml".equals( entry.getName() ) )
                    {
                        // Special handling for setting name of Ant-based projects; customize as needed:
                        filterProjectXML( fo, str, projectRoot.getName() );
                    } else
                    {
                        writeFile( str, fo );
                    }
                }
            }
        }
        finally
        {
            source.close();
        }
    }

    private static void writeFile( ZipInputStream str, FileObject fo ) throws IOException
    {
        OutputStream out = fo.getOutputStream();
        try
        {
            FileUtil.copy( str, out );
        }
        finally
        {
            out.close();
        }
    }

    private static void filterProjectXML( FileObject fo, ZipInputStream str, String name ) throws IOException
    {
        try
        {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            FileUtil.copy( str, baos );
            Document doc = XMLUtil.parse( new InputSource( new ByteArrayInputStream( baos.toByteArray() ) ), false, false, null, null );
            NodeList nl = doc.getDocumentElement().getElementsByTagName( "name" );
            if ( nl != null )
            {
                for ( int i = 0; i < nl.getLength(); i++ )
                {
                    Element el = ( Element ) nl.item( i );
                    if ( el.getParentNode() != null && "data".equals( el.getParentNode().getNodeName() ) )
                    {
                        NodeList nl2 = el.getChildNodes();
                        if ( nl2.getLength() > 0 )
                        {
                            nl2.item( 0 ).setNodeValue( name );
                        }
                        break;
                    }
                }
            }
            OutputStream out = fo.getOutputStream();
            try
            {
                XMLUtil.write( doc, out, "UTF-8" );
            }
            finally
            {
                out.close();
            }
        }
        catch ( Exception ex )
        {
            Exceptions.printStackTrace( ex );
            writeFile( str, fo );
        }

    }
}
